Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions (Schedule Of Disposed Properties) (Details)

v3.21.1
Recent Transactions (Schedule Of Disposed Properties) (Details) - Disposal Group, Not Discontinued Operations [Member]
$ in Thousands
 3 Months Ended
Mar. 31, 2021
USD ($)
ft²
item
shares
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Number of buildings | item 5
Rentable Square Feet | ft² 1,076,256
Net Sales Proceeds $ 282,075
Net Carrying Value 260,314
Realized Gains (losses)/Unrealized Losses, net 21,761
Unrealized gains (losses) on real estate held for sale 1,020
Totals $ 22,781
100 Overlook Center [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Number of buildings | item 1
Rentable Square Feet | ft² 149,600
Net Sales Proceeds $ 34,724
Net Carrying Value 26,488
Realized Gains (losses)/Unrealized Losses, net $ 8,236
Redemption of common units, shares | shares 678,302
Value of units redeemed $ 10,500
Metropark Portfolio [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Number of buildings | item 4
Rentable Square Feet | ft² 926,656
Net Sales Proceeds $ 247,351
Net Carrying Value 233,826
Realized Gains (losses)/Unrealized Losses, net $ 13,525